powerpc/mm: Move mmap_sem unlock up from do_sigbus (c2294e0f) · Commits · 戴 / test

Move mmap_sem releasing in the do_sigbus()'s unique caller : mm_fault_error() No functional changes. Reviewed-by:

arch/powerpc/mm/fault.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -120,8 +120,6 @@ static int do_sigbus(struct pt_regs *regs, unsigned long address,
		siginfo_t info;
		unsigned int lsb = 0;

		up_read(&current->mm->mmap_sem);

		if (!user_mode(regs))
		return MM_FAULT_ERR(SIGBUS);

		@@ -185,8 +183,10 @@ static int mm_fault_error(struct pt_regs *regs, unsigned long addr, int fault)
		return MM_FAULT_RETURN;
		}

		if (fault & (VM_FAULT_SIGBUS\|VM_FAULT_HWPOISON\|VM_FAULT_HWPOISON_LARGE))
		if (fault & (VM_FAULT_SIGBUS\|VM_FAULT_HWPOISON\|VM_FAULT_HWPOISON_LARGE)) {
		up_read(&current->mm->mmap_sem);
		return do_sigbus(regs, addr, fault);
		}

		/* We don't understand the fault code, this is fatal */
		BUG();